Not sure if anyone has noticed this before on the movie poster/soundtrack artwork, but if you look closely, the Jay Gatsby's initials are encircled, almost like door handles on some of the posters and in the trailer:

On the soundtrack's artwork, a similar design is used, but it has Jay-Z's initials instead:

Love cool little details like that so much.

Also, not a big Lana fan, but from the clip I heard of her song, it sounds pretty damn good.